I have noticed that on my system /usr/pluto/bin/Start_NewMD_interactor.sh takes a lot of CPU.

It starts "/usr/pluto/bin/interactor-server" ( whatever it does) in a loop. And it seems that if it already for some reason is running, then interactor-server says that the port is already used and exits. That creates a lot of starts and take quite some CPU.

I have noticed that on my system /usr/pluto/bin/Start_NewMD_interactor.sh takes a lot of CPU.

Have you checked to see if more than one copy of the script is running? I had this issue after an update about a month ago and found that 2 copies of the script were launched. I did a 'sudo kill xxxx' to kill the 2nd process and my CPU usage dropped to normal levels. I think I performed a re-install and the problem did not return afterwards so I am unsure what caused the 2nd script to be executed in the first place. If I recall correctly I had 2 copies of many things that launched erroneously on boot during that time period.